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Cosmic Brownie Cookies Recipe

Cosmic Brownie Cookies Recipe

Chewy, ultra-chocolatey brownie cookies topped with silky ganache and rainbow chips. All the nostalgic Cosmic Brownie vibes in cookie form.
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Prep Time: 20 minutes
Cook Time: 12 minutes
Total Time: 32 minutes
Servings: 18

Ingredients
 

Main Ingredients

  • 10 tbsp unsalted butter, softened room temperature
  • 0.75 cup light brown sugar packed
  • 0.5 cup granulated sugar
  • 2 large eggs room temperature
  • 2 tsp pure vanilla extract
  • 1.25 cup all-purpose flour scooped and leveled
  • 0.67 cup unsweetened cocoa powder Dutch-process if available
  • 0.75 tsp baking soda
  • 0.5 tsp fine sea salt
  • 0.5 tsp instant espresso powder optional, boosts chocolate flavor
  • 0.5 cup mini chocolate chips fold-in
  • 1 cup semisweet chocolate chips for ganache
  • 0.5 cup heavy cream for ganache
  • 1 tbsp unsalted butter for ganache, adds shine
  • 0.33 cup rainbow candy chips or rainbow sprinkles

Instructions

Preparation Steps

  • Preheat oven to 350°F. Line two baking sheets with parchment paper.
  • Cream softened butter, brown sugar, and granulated sugar until light and fluffy, 2–3 minutes.
  • Beat in eggs one at a time, then mix in vanilla until smooth.
  • Whisk flour, cocoa, baking soda, salt, and espresso powder in a separate bowl.
  • Add dry ingredients to wet and mix on low just until combined. Do not overmix.
  • Fold in mini chocolate chips. Let dough rest 5 minutes to thicken.
  • Scoop 1½-tablespoon mounds, spacing 2 inches apart on the sheets.
  • Bake 9–11 minutes, until edges are set and centers look slightly soft.
  • Cool on the sheet 5 minutes, then transfer cookies to a rack to cool completely.
  • Warm cream in a small saucepan until steaming. Remove from heat; add chocolate chips and butter.
  • Let stand 2 minutes, then whisk until glossy and smooth to make ganache.
  • Spoon or spread ganache over cooled cookies and top with rainbow chips. Let set before serving.

Notes

For extra fudgy centers, pull the cookies when the middles still look slightly underbaked. Chill cooked, undecorated cookies up to 3 days or freeze up to 2 months; glaze after thawing. Try peanut butter chips in the ganache for a fun twist.
This recipe is an original creation inspired by classic Cosmic Brownie Cookies Recipe flavors. All ingredient ratios and instructions are independently developed.